<template>
  <div id="components-back-top-demo-custom">
    <a-back-top>
      <div class="ant-back-top-inner">
         <a-icon type="up" />回到顶部
      </div>
    </a-back-top>
  </div>
</template>
<style scoped>
#components-back-top-demo-custom .ant-back-top {
  bottom: 20px;
}
#components-back-top-demo-custom .ant-back-top-inner {
  height: 30px;
  width: 120px;
  line-height: 30px;
 background: #37a7e6;
 border-radius: 5px;
  color: #fff;
  text-align: center;
  font-size: 16px;
}
</style>